Feature maxxing

Author: michaelsproul

.github/workflows/test-suite.yml

@@ -23,14 +23,16 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
+        features: ["", "ring", "zero_hash_cache", "ring,zero_hash_cache"]
     runs-on: ${{ matrix.os }}
-    name: test-${{ matrix.os }}
+    name: test-${{ matrix.os }}-feat-${{ matrix.features }}
     steps:
     - uses: actions/checkout@v3
     - name: Get latest version of stable Rust
       run: rustup update stable
     - name: Run tests
-      run: cargo test --release
+      run: cargo test --release --no-default-features --features ${{ matrix.features }}
+  # We use `--skip-clean` to aggregate the coverage from runs with different features.
   coverage:
     runs-on: ubuntu-latest
     name: cargo-tarpaulin
@@ -40,8 +42,14 @@ jobs:
       run: rustup update stable
     - name: Install cargo-tarpaulin
       uses: taiki-e/install-action@cargo-tarpaulin
-    - name: Check code coverage with cargo-tarpaulin
-      run: cargo-tarpaulin --workspace --all-features --out xml
+    - name: Check code coverage with cargo-tarpaulin (no features)
+      run: cargo-tarpaulin --workspace --out xml --no-default-features
+    - name: Check code coverage with cargo-tarpaulin (just `ring` feature)
+      run: cargo-tarpaulin --workspace --out xml --skip-clean --no-default-features --features "ring"
+    - name: Check code coverage with cargo-tarpaulin (just `zero_hash_cache` feature)
+      run: cargo-tarpaulin --workspace --out xml --skip-clean --no-default-features --features "zero_hash_cache"
+    - name: Check code coverage with cargo-tarpaulin (all features)
+      run: cargo-tarpaulin --workspace --out xml --skip-clean --all-features
     - name: Upload to codecov.io
       uses: codecov/codecov-action@v3
       with: